fe_abf.h

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// -----------------------------------------------------------------------------
//
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception OR LGPL-2.1-or-later
// Copyright (C) 2003 - 2024 by the deal.II authors
//
// This file is part of the deal.II library.
//
// Detailed license information governing the source code and contributions
// can be found in LICENSE.md and CONTRIBUTING.md at the top level directory.
//
// -----------------------------------------------------------------------------
 
#ifndef dealii_fe_abf_h
#define dealii_fe_abf_h
 
#include <deal.II/base/config.h>
 
#include <deal.II/base/geometry_info.h>
#include <deal.II/base/polynomial.h>
#include <deal.II/base/polynomials_abf.h>
#include <deal.II/base/table.h>
#include <deal.II/base/tensor_product_polynomials.h>
 
#include <deal.II/fe/fe.h>
#include <deal.II/fe/fe_poly_tensor.h>
 
#include <vector>
 
DEAL_II_NAMESPACE_OPEN
 
 
template <int dim>
class FE_ABF : public FE_PolyTensor<dim>
{
public:
  FE_ABF(const unsigned int p);
 
  virtual std::string
  get_name() const override;
 
  virtual bool
  has_support_on_face(const unsigned int shape_index,
                      const unsigned int face_index) const override;
 
  // documentation inherited from the base class
  virtual void
  convert_generalized_support_point_values_to_dof_values(
    const std::vector<Vector<double>> &support_point_values,
    std::vector<double>               &nodal_values) const override;
 
  virtual std::size_t
  memory_consumption() const override;
 
  virtual std::unique_ptr<FiniteElement<dim, dim>>
  clone() const override;
 
private:
  const unsigned int rt_order;
 
  static std::vector<unsigned int>
  get_dpo_vector(const unsigned int degree);
 
  void
  initialize_support_points(const unsigned int rt_degree);
 
  void
  initialize_restriction();
 
  class InternalData : public FiniteElement<dim>::InternalDataBase
  {
  public:
    std::vector<std::vector<Tensor<1, dim>>> shape_values;
 
    std::vector<std::vector<Tensor<2, dim>>> shape_gradients;
  };
 
  Table<2, double> boundary_weights;
  Table<3, double> interior_weights;
 
 
 
  Table<2, double> boundary_weights_abf;
  Table<3, double> interior_weights_abf;
 
  void
  initialize_quad_dof_index_permutation_and_sign_change();
 
  // Allow access from other dimensions.
  template <int dim1>
  friend class FE_ABF;
};
 
 
 
DEAL_II_NAMESPACE_CLOSE
 
#endif